Provides an interface for an object containing the current state of a form.

This is passed to all form related code so that the caller can use it to
examine what in the form changed when the form submission process is
complete. Furthermore, it may be used to store information related to the
processed data in the form, which will persist across page requests when the
'cache' or 'rebuild' flag is set. See
\Drupal\Core\Form\FormState::$internalStorage for documentation of the
available flags.

File

Namespace

interfaceFormStateInterface {
/**
* Returns a reference to the complete form array.
*
* @return array
* The complete form array.
*/publicfunction &getCompleteForm();
/**
* Stores the complete form array.
*
* @param array $complete_form
* The complete form array.
*
* @return $this
*/publicfunctionsetCompleteForm(array &$complete_form);
/**
* Ensures an include file is loaded whenever the form is processed.
*
* Example:
* @code
* // Load node.admin.inc from Node module.
* $form_state->loadInclude('node', 'inc', 'node.admin');
* @endcode
*
* Use this function instead of module_load_include() from inside a form
* constructor or any form processing logic as it ensures that the include file
* is loaded whenever the form is processed. In contrast to using
* module_load_include() directly, this method makes sure the include file is
* correctly loaded also if the form is cached.
*
* @param string $module
* The module to which the include file belongs.
* @param string $type
* The include file's type (file extension).
* @param string|null $name
* (optional) The base file name (without the $type extension). If omitted,
* $module is used; i.e., resulting in "$module.$type" by default.
*
* @return string|false
* The filepath of the loaded include file, or FALSE if the include file was
* not found or has been loaded already.
*
* @see module_load_include()
*/publicfunctionloadInclude($module, $type, $name = NULL);
/**
* Returns an array representation of the cacheable portion of the form state.
*
* @return array
* The cacheable portion of the form state.
*/publicfunctiongetCacheableArray();
/**
* Sets the value of the form state.
*
* @param array $form_state_additions
* An array of values to add to the form state.
*
* @return $this
*/publicfunctionsetFormState(array$form_state_additions);
/**
* Sets a response for this form.
*
* If a response is set, it will be used during processing and returned
* directly. The form will not be rebuilt or redirected.
*
* @param \Symfony\Component\HttpFoundation\Response $response
* The response to return.
*
* @return $this
*/publicfunctionsetResponse(Response$response);
/**
* Gets a response for this form.
*
* If a response is set, it will be used during processing and returned
* directly. The form will not be rebuilt or redirected.
*
* @return \Symfony\Component\HttpFoundation\Response|null
* The response to return, or NULL.
*/publicfunctiongetResponse();
/**
* Sets the redirect for the form.
*
* @param string $route_name
* The name of the route
* @param array $route_parameters
* (optional) An associative array of parameter names and values.
* @param array $options
* (optional) An associative array of additional options. See
* \Drupal\Core\Url for the available keys.
*
* @return $this
*
* @see \Drupal\Core\Form\FormSubmitterInterface::redirectForm()
*/publicfunctionsetRedirect($route_name, array$route_parameters = array(), array$options = array());
/**
* Sets the redirect URL for the form.
*
* @param \Drupal\Core\Url $url
* The URL to redirect to.
*
* @return $this
*
* @see \Drupal\Core\Form\FormSubmitterInterface::redirectForm()
*/publicfunctionsetRedirectUrl(Url$url);
/**
* Gets the value to use for redirecting after the form has been executed.
*
* @see \Drupal\Core\Form\FormSubmitterInterface::redirectForm()
*
* @return mixed
* The value will be one of the following:
* - A fully prepared \Symfony\Component\HttpFoundation\RedirectResponse.
* - An instance of \Drupal\Core\Url to use for the redirect.
* - NULL, to signify that no redirect was specified and that the current
* path should be used for the redirect.
* - FALSE, to signify that no redirect should take place.
*/publicfunctiongetRedirect();
/**
* Sets the entire set of arbitrary data.
*
* @param array $storage
* The entire set of arbitrary data to store for this form.
*
* @return $this
*/publicfunctionsetStorage(array$storage);
/**
* Returns the entire set of arbitrary data.
*
* @return array
* The entire set of arbitrary data to store for this form.
*/publicfunction &getStorage();
/**
* Gets any arbitrary property.
*
* @param string|array $property
* Properties are often stored as multi-dimensional associative arrays. If
* $property is a string, it will return $storage[$property]. If $property
* is an array, each element of the array will be used as a nested key. If
* $property = ['foo', 'bar'] it will return $storage['foo']['bar'].
*
* @return mixed
* A reference to the value for that property, or NULL if the property does
* not exist.
*/publicfunction &get($property);
/**
* Sets a value to an arbitrary property.
*
* @param string|array $property
* Properties are often stored as multi-dimensional associative arrays. If
* $property is a string, it will use $storage[$property] = $value. If
* $property is an array, each element of the array will be used as a nested
* key. If $property = ['foo', 'bar'] it will use
* $storage['foo']['bar'] = $value.
* @param mixed $value
* The value to set.
*
* @return $this
*/publicfunctionset($property, $value);
/**
* Determines if an arbitrary property is present.
*
* @param string $property
* Properties are often stored as multi-dimensional associative arrays. If
* $property is a string, it will return isset($storage[$property]). If
* $property is an array, each element of the array will be used as a nested
* key. If $property = ['foo', 'bar'] it will return
* isset($storage['foo']['bar']).
*/publicfunctionhas($property);
/**
* Sets the build info for the form.
*
* @param array $build_info
* An array of build info.
*
* @return $this
*
* @see \Drupal\Core\Form\FormState::$build_info
*/publicfunctionsetBuildInfo(array$build_info);
/**
* Returns the build info for the form.
*
* @return array
* An array of build info.
*
* @see \Drupal\Core\Form\FormState::$build_info
*/publicfunctiongetBuildInfo();
/**
* Adds a value to the build info.
*
* @param string $property
* The property to use for the value.
* @param mixed $value
* The value to set.
*
* @return $this
*/publicfunctionaddBuildInfo($property, $value);
/**
* Returns the form values as they were submitted by the user.
*
* These are raw and unvalidated, so should not be used without a thorough
* understanding of security implications. In almost all cases, code should
* use self::getValues() and self::getValue() exclusively.
*
* @return array
* An associative array of values submitted to the form.
*/publicfunction &getUserInput();
/**
* Sets the form values as though they were submitted by a user.
*
* @param array $user_input
* An associative array of raw and unvalidated values.
*
* @return $this
*/publicfunctionsetUserInput(array$user_input);
/**
* Returns the submitted and sanitized form values.
*
* @return array
* An associative array of values submitted to the form.
*/publicfunction &getValues();
/**
* Returns the submitted form value for a specific key.
*
* @param string|array $key
* Values are stored as a multi-dimensional associative array. If $key is a
* string, it will return $values[$key]. If $key is an array, each element
* of the array will be used as a nested key. If $key = array('foo', 'bar')
* it will return $values['foo']['bar'].
* @param mixed $default
* (optional) The default value if the specified key does not exist.
*
* @return mixed
* The value for the given key, or NULL.
*/publicfunction &getValue($key, $default = NULL);
/**
* Sets the submitted form values.
*
* This should be avoided, since these values have been validated already. Use
* self::setUserInput() instead.
*
* @param array $values
* The multi-dimensional associative array of form values.
*
* @return $this
*/publicfunctionsetValues(array$values);
/**
* Sets the submitted form value for a specific key.
*
* @param string|array $key
* Values are stored as a multi-dimensional associative array. If $key is a
* string, it will use $values[$key] = $value. If $key is an array, each
* element of the array will be used as a nested key. If
* $key = array('foo', 'bar') it will use $values['foo']['bar'] = $value.
* @param mixed $value
* The value to set.
*
* @return $this
*/publicfunctionsetValue($key, $value);
/**
* Removes a specific key from the submitted form values.
*
* @param string|array $key
* Values are stored as a multi-dimensional associative array. If $key is a
* string, it will use unset($values[$key]). If $key is an array, each
* element of the array will be used as a nested key. If
* $key = array('foo', 'bar') it will use unset($values['foo']['bar']).
*
* @return $this
*/publicfunctionunsetValue($key);
/**
* Determines if a specific key is present in the submitted form values.
*
* @param string|array $key
* Values are stored as a multi-dimensional associative array. If $key is a
* string, it will return isset($values[$key]). If $key is an array, each
* element of the array will be used as a nested key. If
* $key = array('foo', 'bar') it will return isset($values['foo']['bar']).
*
* @return bool
* TRUE if the $key is set, FALSE otherwise.
*/publicfunctionhasValue($key);
/**
* Determines if a specific key has a value in the submitted form values.
*
* @param string|array $key
* Values are stored as a multi-dimensional associative array. If $key is a
* string, it will return empty($values[$key]). If $key is an array, each
* element of the array will be used as a nested key. If
* $key = array('foo', 'bar') it will return empty($values['foo']['bar']).
*
* @return bool
* TRUE if the $key has no value, FALSE otherwise.
*/publicfunctionisValueEmpty($key);
/**
* Changes submitted form values during form validation.
*
* Use this function to change the submitted value of a form element in a form
* validation function, so that the changed value persists in $form_state
* through to the submission handlers.
*
* Note that form validation functions are specified in the '#validate'
* component of the form array (the value of $form['#validate'] is an array of
* validation function names). If the form does not originate in your module,
* you can implement hook_form_FORM_ID_alter() to add a validation function
* to $form['#validate'].
*
* @param array $element
* The form element that should have its value updated; in most cases you
* can just pass in the element from the $form array, although the only
* component that is actually used is '#parents'. If constructing yourself,
* set $element['#parents'] to be an array giving the path through the form
* array's keys to the element whose value you want to update. For instance,
* if you want to update the value of $form['elem1']['elem2'], which should
* be stored in $form_state->getValue(array('elem1', 'elem2')), you would
* set $element['#parents'] = array('elem1','elem2').
* @param mixed $value
* The new value for the form element.
*
* @return $this
*/publicfunctionsetValueForElement(array$element, $value);
/**
* Determines if any forms have any errors.
*
* @return bool
* TRUE if any form has any errors, FALSE otherwise.
*/publicstaticfunctionhasAnyErrors();
/**
* Files an error against a form element.
*
* When a validation error is detected, the validator calls this method to
* indicate which element needs to be changed and provide an error message.
* This causes the Form API to not execute the form submit handlers, and
* instead to re-display the form to the user with the corresponding elements
* rendered with an 'error' CSS class (shown as red by default).
*
* The standard behavior of this method can be changed if a button provides
* the #limit_validation_errors property. Multistep forms not wanting to
* validate the whole form can set #limit_validation_errors on buttons to
* limit validation errors to only certain elements. For example, pressing the
* "Previous" button in a multistep form should not fire validation errors
* just because the current step has invalid values. If
* #limit_validation_errors is set on a clicked button, the button must also
* define a #submit property (may be set to an empty array). Any #submit
* handlers will be executed even if there is invalid input, so extreme care
* should be taken with respect to any actions taken by them. This is
* typically not a problem with buttons like "Previous" or "Add more" that do
* not invoke persistent storage of the submitted form values. Do not use the
* #limit_validation_errors property on buttons that trigger saving of form
* values to the database.
*
* The #limit_validation_errors property is a list of "sections" within
* $form_state->getValues() that must contain valid values. Each "section" is
* an array with the ordered set of keys needed to reach that part of
* $form_state->getValues() (i.e., the #parents property of the element).
*
* Example 1: Allow the "Previous" button to function, regardless of whether
* any user input is valid.
*
* @code
* $form['actions']['previous'] = array(
* '#type' => 'submit',
* '#value' => t('Previous'),
* '#limit_validation_errors' => array(), // No validation.
* '#submit' => array('some_submit_function'), // #submit required.
* );
* @endcode
*
* Example 2: Require some, but not all, user input to be valid to process the
* submission of a "Previous" button.
*
* @code
* $form['actions']['previous'] = array(
* '#type' => 'submit',
* '#value' => t('Previous'),
* '#limit_validation_errors' => array(
* // Validate $form_state->getValue('step1').
* array('step1'),
* // Validate $form_state->getValue(array('foo', 'bar')).
* array('foo', 'bar'),
* ),
* '#submit' => array('some_submit_function'), // #submit required.
* );
* @endcode
*
* This will require $form_state->getValue('step1') and everything within it
* (for example, $form_state->getValue(array('step1', 'choice'))) to be valid,
* so calls to self::setErrorByName('step1', $message) or
* self::setErrorByName('step1][choice', $message) will prevent the submit
* handlers from running, and result in the error message being displayed to
* the user. However, calls to self::setErrorByName('step2', $message) and
* self::setErrorByName('step2][groupX][choiceY', $message) will be
* suppressed, resulting in the message not being displayed to the user, and
* the submit handlers will run despite $form_state->getValue('step2') and
* $form_state->getValue(array('step2', 'groupX', 'choiceY')) containing
* invalid values. Errors for an invalid $form_state->getValue('foo') will be
* suppressed, but errors flagging invalid values for
* $form_state->getValue(array('foo', 'bar')) and everything within it will
* be flagged and submission prevented.
*
* Partial form validation is implemented by suppressing errors rather than by
* skipping the input processing and validation steps entirely, because some
* forms have button-level submit handlers that call Drupal API functions that
* assume that certain data exists within $form_state->getValues(), and while
* not doing anything with that data that requires it to be valid, PHP errors
* would be triggered if the input processing and validation steps were fully
* skipped.
*
* @param string $name
* The name of the form element. If the #parents property of your form
* element is array('foo', 'bar', 'baz') then you may set an error on 'foo'
* or 'foo][bar][baz'. Setting an error on 'foo' sets an error for every
* element where the #parents array starts with 'foo'.
* @param string $message
* (optional) The error message to present to the user.
*
* @return $this
*/publicfunctionsetErrorByName($name, $message = '');
/**
* Flags an element as having an error.
*
* @param array $element
* The form element.
* @param string $message
* (optional) The error message to present to the user.
*
* @return $this
*/publicfunctionsetError(array &$element, $message = '');
/**
* Clears all errors against all form elements made by self::setErrorByName().
*/publicfunctionclearErrors();
/**
* Returns an associative array of all errors.
*
* @return array
* An array of all errors, keyed by the name of the form element.
*/publicfunctiongetErrors();
/**
* Returns the error message filed against the given form element.
*
* Form errors higher up in the form structure override deeper errors as well
* as errors on the element itself.
*
* @param array $element
* The form element to check for errors.
*
* @return string|null
* Either the error message for this element or NULL if there are no errors.
*/publicfunctiongetError(array$element);
/**
* Sets the form to be rebuilt after processing.
*
* @param bool $rebuild
* (optional) Whether the form should be rebuilt or not. Defaults to TRUE.
*
* @return $this
*/publicfunctionsetRebuild($rebuild = TRUE);
/**
* Determines if the form should be rebuilt after processing.
*
* @return bool
* TRUE if the form should be rebuilt, FALSE otherwise.
*/publicfunctionisRebuilding();
/**
* Flags the form state as having or not an invalid token.
*
* @param bool $invalid_token
* Whether the form has an invalid token.
*
* @return $this
*/publicfunctionsetInvalidToken($invalid_token);
/**
* Determines if the form has an invalid token.
*
* @return bool
* TRUE if the form has an invalid token, FALSE otherwise.
*/publicfunctionhasInvalidToken();
/**
* Converts support notations for a form callback to a valid callable.
*
* Specifically, supports methods on the form/callback object as strings when
* they start with ::, for example "::submitForm()".
*
* @param string|array $callback
* The callback.
*
* @return array|string
* A valid callable.
*/publicfunctionprepareCallback($callback);
/**
* Returns the form object that is responsible for building this form.
*
* @return \Drupal\Core\Form\FormInterface
* The form object.
*/publicfunctiongetFormObject();
/**
* Sets the form object that is responsible for building this form.
*
* @param \Drupal\Core\Form\FormInterface $form_object
* The form object.
*
* @return $this
*/publicfunctionsetFormObject(FormInterface$form_object);
/**
* Sets this form to always be processed.
*
* This should only be used on RESTful GET forms that do NOT write data, as
* this could lead to security issues. It is useful so that searches do not
* need to have a form_id in their query arguments to trigger the search.
*
* @param bool $always_process
* TRUE if the form should always be processed, FALSE otherwise.
*
* @return $this
*/publicfunctionsetAlwaysProcess($always_process = TRUE);
/**
* Determines if this form should always be processed.
*
* @return bool
* TRUE if the form should always be processed, FALSE otherwise.
*/publicfunctiongetAlwaysProcess();
/**
* Stores the submit and button elements for the form.
*
* @param array $buttons
* The submit and button elements.
*
* @return $this
*/publicfunctionsetButtons(array$buttons);
/**
* Returns the submit and button elements for the form.
*
* @return array
* The submit and button elements.
*/publicfunctiongetButtons();
/**
* Sets this form to be cached.
*
* @param bool $cache
* TRUE if the form should be cached, FALSE otherwise.
*
* @return $this
*
* @throws \LogicException
* If the current request is using an HTTP method that must not change
* state (e.g., GET).
*/publicfunctionsetCached($cache = TRUE);
/**
* Determines if the form should be cached.
*
* @return bool
* TRUE if the form should be cached, FALSE otherwise.
*/publicfunctionisCached();
/**
* Prevents the form from being cached.
*
* @return $this
*/publicfunctiondisableCache();
/**
* Sets that the form was submitted and has been processed and executed.
*
* @return $this
*/publicfunctionsetExecuted();
/**
* Determines if the form was submitted and has been processed and executed.
*
* @return bool
* TRUE if the form was submitted and has been processed and executed.
*/publicfunctionisExecuted();
/**
* Sets references to details elements to render them within vertical tabs.
*
* @param array $groups
* References to details elements to render them within vertical tabs.
*
* @return $this
*/publicfunctionsetGroups(array$groups);
/**
* Returns references to details elements to render them within vertical tabs.
*
* @return array
*/publicfunction &getGroups();
/**
* Sets that this form has a file element.
*
* @param bool $has_file_element
* Whether this form has a file element.
*
* @return $this
*/publicfunctionsetHasFileElement($has_file_element = TRUE);
/**
* Returns whether this form has a file element.
*
* @return bool
* Whether this form has a file element.
*/publicfunctionhasFileElement();
/**
* Sets the limited validation error sections.
*
* @param array|null $limit_validation_errors
* The limited validation error sections.
*
* @return $this
*
* @see \Drupal\Core\Form\FormState::$limit_validation_errors
*/publicfunctionsetLimitValidationErrors($limit_validation_errors);
/**
* Retrieves the limited validation error sections.
*
* @return array|null
* The limited validation error sections.
*
* @see \Drupal\Core\Form\FormState::$limit_validation_errors
*/publicfunctiongetLimitValidationErrors();
/**
* Sets the HTTP method to use for the form's submission.
*
* This is what the form's "method" attribute should be, not necessarily what
* the current request's HTTP method is. For example, a form can have a
* method attribute of POST, but the request that initially builds it uses
* GET.
*
* @param string $method
* Either "GET" or "POST". Other HTTP methods are not valid form submission
* methods.
*
* @see \Drupal\Core\Form\FormState::$method
* @see \Drupal\Core\Form\FormStateInterface::setRequestMethod()
*
* @return $this
*/publicfunctionsetMethod($method);
/**
* Sets the HTTP method used by the request that is building the form.
*
* @param string $method
* Can be any valid HTTP method, such as GET, POST, HEAD, etc.
*
* @return $this
*
* @see \Drupal\Core\Form\FormStateInterface::setMethod()
*/publicfunctionsetRequestMethod($method);
/**
* Returns the HTTP form method.
*
* @param string
* The HTTP form method.
*
* @return bool
* TRUE if the HTTP form method matches.
*
* @see \Drupal\Core\Form\FormState::$method
*/publicfunctionisMethodType($method_type);
/**
* Enforces that validation is run.
*
* @param bool $must_validate
* If TRUE, validation will always be run.
*
* @return $this
*/publicfunctionsetValidationEnforced($must_validate = TRUE);
/**
* Checks if validation is enforced.
*
* @return bool
* If TRUE, validation will always be run.
*/publicfunctionisValidationEnforced();
/**
* Prevents the form from redirecting.
*
* @param bool $no_redirect
* If TRUE, the form will not redirect.
*
* @return $this
*/publicfunctiondisableRedirect($no_redirect = TRUE);
/**
* Determines if redirecting has been prevented.
*
* @return bool
* If TRUE, the form will not redirect.
*/publicfunctionisRedirectDisabled();
/**
* Sets that the form should process input.
*
* @param bool $process_input
* If TRUE, the form input will be processed.
*
* @return $this
*/publicfunctionsetProcessInput($process_input = TRUE);
/**
* Determines if the form input will be processed.
*
* @return bool
* If TRUE, the form input will be processed.
*/publicfunctionisProcessingInput();
/**
* Sets that this form was submitted programmatically.
*
* @param bool $programmed
* If TRUE, the form was submitted programmatically.
*
* @return $this
*/publicfunctionsetProgrammed($programmed = TRUE);
/**
* Returns if this form was submitted programmatically.
*
* @return bool
* If TRUE, the form was submitted programmatically.
*/publicfunctionisProgrammed();
/**
* Sets if this form submission should bypass #access.
*
* @param bool $programmed_bypass_access_check
* If TRUE, programmatic form submissions are processed without taking
* #access into account.
*
* @return $this
*
* @see \Drupal\Core\Form\FormState::$programmed_bypass_access_check
*/publicfunctionsetProgrammedBypassAccessCheck($programmed_bypass_access_check = TRUE);
/**
* Determines if this form submission should bypass #access.
*
* @return bool
*
* @see \Drupal\Core\Form\FormState::$programmed_bypass_access_check
*/publicfunctionisBypassingProgrammedAccessChecks();
/**
* Sets the rebuild info.
*
* @param array $rebuild_info
* The rebuild info.
*
* @return $this
*
* @see \Drupal\Core\Form\FormState::$rebuild_info
*/publicfunctionsetRebuildInfo(array$rebuild_info);
/**
* Gets the rebuild info.
*
* @return array
* The rebuild info.
*
* @see \Drupal\Core\Form\FormState::$rebuild_info
*/publicfunctiongetRebuildInfo();
/**
* Adds a value to the rebuild info.
*
* @param string $property
* The property to use for the value.
* @param mixed $value
* The value to set.
*
* @return $this
*/publicfunctionaddRebuildInfo($property, $value);
/**
* Sets the submit handlers.
*
* @param array $submit_handlers
* An array of submit handlers.
*
* @return $this
*/publicfunctionsetSubmitHandlers(array$submit_handlers);
/**
* Gets the submit handlers.
*
* @return array
* An array of submit handlers.
*/publicfunctiongetSubmitHandlers();
/**
* Sets that the form has been submitted.
*
* @return $this
*/publicfunctionsetSubmitted();
/**
* Determines if the form has been submitted.
*
* @return bool
* TRUE if the form has been submitted, FALSE otherwise.
*/publicfunctionisSubmitted();
/**
* Sets temporary data.
*
* @param array $temporary
* Temporary data accessible during the current page request only.
*
* @return $this
*/publicfunctionsetTemporary(array$temporary);
/**
* Gets temporary data.
*
* @return array
* Temporary data accessible during the current page request only.
*/publicfunctiongetTemporary();
/**
* Gets an arbitrary value from temporary storage.
*
* @param string|array $key
* Properties are often stored as multi-dimensional associative arrays. If
* $key is a string, it will return $temporary[$key]. If $key is an array,
* each element of the array will be used as a nested key. If
* $key = ['foo', 'bar'] it will return $temporary['foo']['bar'].
*
* @return mixed
* A reference to the value for that key, or NULL if the property does
* not exist.
*/publicfunction &getTemporaryValue($key);
/**
* Sets an arbitrary value in temporary storage.
*
* @param string|array $key
* Properties are often stored as multi-dimensional associative arrays. If
* $key is a string, it will use $temporary[$key] = $value. If $key is an
* array, each element of the array will be used as a nested key. If
* $key = ['foo', 'bar'] it will use $temporary['foo']['bar'] = $value.
* @param mixed $value
* The value to set.
*
* @return $this
*/publicfunctionsetTemporaryValue($key, $value);
/**
* Determines if a temporary value is present.
*
* @param string $key
* Properties are often stored as multi-dimensional associative arrays. If
* $key is a string, it will return isset($temporary[$key]). If $key is an
* array, each element of the array will be used as a nested key. If
* $key = ['foo', 'bar'] it will return isset($temporary['foo']['bar']).
*/publicfunctionhasTemporaryValue($key);
/**
* Sets the form element that triggered submission.
*
* @param array|null $triggering_element
* The form element that triggered submission, of NULL if there is none.
*
* @return $this
*/publicfunctionsetTriggeringElement($triggering_element);
/**
* Gets the form element that triggered submission.
*
* @return array|null
* The form element that triggered submission, of NULL if there is none.
*/publicfunction &getTriggeringElement();
/**
* Sets the validate handlers.
*
* @param array $validate_handlers
* An array of validate handlers.
*
* @return $this
*/publicfunctionsetValidateHandlers(array$validate_handlers);
/**
* Gets the validate handlers.
*
* @return array
* An array of validate handlers.
*/publicfunctiongetValidateHandlers();
/**
* Sets that validation has been completed.
*
* @param bool $validation_complete
* TRUE if validation is complete, FALSE otherwise.
*
* @return $this
*/publicfunctionsetValidationComplete($validation_complete = TRUE);
/**
* Determines if validation has been completed.
*
* @return bool
* TRUE if validation is complete, FALSE otherwise.
*/publicfunctionisValidationComplete();
/**
* Gets the keys of the form values that will be cleaned.
*
* @return array
* An array of form value keys to be cleaned.
*/publicfunctiongetCleanValueKeys();
/**
* Sets the keys of the form values that will be cleaned.
*
* @param array $keys
* An array of form value keys to be cleaned.
*
* @return $this
*/publicfunctionsetCleanValueKeys(array$keys);
/**
* Adds a key to the array of form values that will be cleaned.
*
* @param string $key
* The form value key to be cleaned.
*
* @return $this
*/publicfunctionaddCleanValueKey($key);
/**
* Removes internal Form API elements and buttons from submitted form values.
*
* This function can be used when a module wants to store all submitted form
* values, for example, by serializing them into a single database column. In
* such cases, all internal Form API values and all form button elements
* should not be contained, and this function allows their removal before the
* module proceeds to storage. Next to button elements, the following internal
* values are removed by default.
* - form_id
* - form_token
* - form_build_id
* - op
*
* @return $this
*/publicfunctioncleanValues();
}